text: By means of controlling the identity and reactivity of the endcaps, PPA can withstand harsh chemical conditions with no significant changes in its structure. For instance, while functionalizing PPA with an allyl acetate and tert-butyldimethylsilyl ether functional groups can lead to its rapid depolymerization in the presence of Pd(0) and F respectively, a simple change in the nature of the endcaps will preserve the chain even in the presence of both corrosive agents. On a separate note, while PPA is insoluble in aqueous solvents and alcohols, it is highly soluble in organic solvents such as THF, DCM, and DMSO where it can be dissolved for days without triggering depolymerization.